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wdenk60164a82003-10-08 23:26:14 +00001/*
2 * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
3 * Scott McNutt <smcnutt@psyent.com>
4 *
5 * (C) Copyright 2000-2002
6 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
7 *
8 * See file CREDITS for list of people who contributed to this
9 * project.
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 * MA 02111-1307 USA
25 */
26
27#include <common.h>
28#include <devices.h>
29#include <watchdog.h>
wdenk3da587e2003-10-19 23:22:11 +000030#include <net.h>
wdenk3be717f2004-01-03 19:43:48 +000031#ifdef CONFIG_STATUS_LED
32#include <status_led.h>
33#endif
wdenk60164a82003-10-08 23:26:14 +000034
Wolfgang Denk6405a152006-03-31 18:32:53 +020035DECLARE_GLOBAL_DATA_PTR;
wdenk60164a82003-10-08 23:26:14 +000036
37/*
38 * All attempts to come up with a "common" initialization sequence
39 * that works for all boards and architectures failed: some of the
40 * requirements are just _too_ different. To get rid of the resulting
41 * mess of board dependend #ifdef'ed code we now make the whole
42 * initialization sequence configurable to the user.
43 *
44 * The requirements for any new initalization function is simple: it
45 * receives a pointer to the "global data" structure as it's only
46 * argument, and returns an integer return code, where 0 means
47 * "continue" and != 0 means "fatal error, hang the system".
48 */
49
50
51extern void malloc_bin_reloc (void);
52typedef int (init_fnc_t) (void);
wdenk60164a82003-10-08 23:26:14 +000053
54/*
55 * Begin and End of memory area for malloc(), and current "brk"
56 */
57static ulong mem_malloc_start = 0;
58static ulong mem_malloc_end = 0;
59static ulong mem_malloc_brk = 0;
60
61/*
62 * The Malloc area is immediately below the monitor copy in RAM
63 */
64static void mem_malloc_init (void)
65{
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +020066 mem_malloc_start = CONFIG_SYS_MALLOC_BASE;
67 mem_malloc_end = mem_malloc_start + CONFIG_SYS_MALLOC_LEN;
wdenk60164a82003-10-08 23:26:14 +000068 mem_malloc_brk = mem_malloc_start;
69 memset ((void *) mem_malloc_start,
70 0,
71 mem_malloc_end - mem_malloc_start);
72}
73
74void *sbrk (ptrdiff_t increment)
75{
76 ulong old = mem_malloc_brk;
77 ulong new = old + increment;
78
79 if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
80 return (NULL);
81 }
82 mem_malloc_brk = new;
83 return ((void *) old);
84}
85
86
87/************************************************************************
88 * Initialization sequence *
89 ***********************************************************************/
90
91init_fnc_t *init_sequence[] = {
92
wdenkda55c6e2004-01-20 23:12:12 +000093#if defined(CONFIG_BOARD_EARLY_INIT_F)
94 board_early_init_f, /* Call board-specific init code early.*/
wdenk60164a82003-10-08 23:26:14 +000095#endif
96
97 env_init,
98 serial_init,
99 console_init_f,
100 display_options,
101 checkcpu,
102 checkboard,
103 NULL, /* Terminate this list */
104};
105
106
107/***********************************************************************/
108void board_init (void)
109{
wdenk60164a82003-10-08 23:26:14 +0000110 bd_t *bd;
111 init_fnc_t **init_fnc_ptr;
wdenk3da587e2003-10-19 23:22:11 +0000112 char *s, *e;
113 int i;
wdenk60164a82003-10-08 23:26:14 +0000114
115 /* Pointer is writable since we allocated a register for it.
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200116 * Nios treats CONFIG_SYS_GBL_DATA_OFFSET as an address.
wdenk60164a82003-10-08 23:26:14 +0000117 */
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200118 gd = (gd_t *)CONFIG_SYS_GBL_DATA_OFFSET;
wdenk3337af42004-07-01 20:28:03 +0000119 /* compiler optimization barrier needed for GCC >= 3.4 */
120 __asm__ __volatile__("": : :"memory");
121
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200122 memset( gd, 0, CONFIG_SYS_GBL_DATA_SIZE );
wdenk60164a82003-10-08 23:26:14 +0000123
wdenk60164a82003-10-08 23:26:14 +0000124 gd->bd = (bd_t *)(gd+1); /* At end of global data */
125 gd->baudrate = CONFIG_BAUDRATE;
126 gd->cpu_clk = CONFIG_SYS_CLK_FREQ;
127
128 bd = gd->bd;
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200129 bd->bi_memstart = CONFIG_SYS_SDRAM_BASE;
130 bd->bi_memsize = CONFIG_SYS_SDRAM_SIZE;
131 bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
132#if defined(CONFIG_SYS_SRAM_BASE) && defined(CONFIG_SYS_SRAM_SIZE)
133 bd->bi_sramstart= CONFIG_SYS_SRAM_BASE;
134 bd->bi_sramsize = CONFIG_SYS_SRAM_SIZE;
wdenkc0bc2e12004-02-09 23:12:24 +0000135#endif
wdenk60164a82003-10-08 23:26:14 +0000136 bd->bi_baudrate = CONFIG_BAUDRATE;
137
138 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
wdenke537b3b2004-02-23 23:54:43 +0000139 WATCHDOG_RESET ();
wdenk60164a82003-10-08 23:26:14 +0000140 if ((*init_fnc_ptr) () != 0) {
141 hang ();
142 }
143 }
144
wdenke537b3b2004-02-23 23:54:43 +0000145 WATCHDOG_RESET ();
Stefan Roeseb81464e2009-05-11 15:50:12 +0200146 mem_malloc_init();
147 malloc_bin_reloc();
148
149 WATCHDOG_RESET ();
wdenk60164a82003-10-08 23:26:14 +0000150 bd->bi_flashsize = flash_init();
151
wdenke537b3b2004-02-23 23:54:43 +0000152 WATCHDOG_RESET ();
wdenk60164a82003-10-08 23:26:14 +0000153 env_relocate();
154
wdenk55618472003-10-28 09:14:21 +0000155 bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
wdenk55618472003-10-28 09:14:21 +0000156
wdenke537b3b2004-02-23 23:54:43 +0000157 WATCHDOG_RESET ();
wdenk60164a82003-10-08 23:26:14 +0000158 devices_init();
159 jumptable_init();
160 console_init_r();
161 /*
162 */
163
wdenke537b3b2004-02-23 23:54:43 +0000164 WATCHDOG_RESET ();
wdenk60164a82003-10-08 23:26:14 +0000165 interrupt_init ();
wdenk3be717f2004-01-03 19:43:48 +0000166
167#ifdef CONFIG_STATUS_LED
168 status_led_set(STATUS_LED_BOOT, STATUS_LED_BLINKING);
169#endif
170
wdenk60164a82003-10-08 23:26:14 +0000171 /* main_loop */
172 for (;;) {
173 WATCHDOG_RESET ();
174 main_loop ();
175 }
176}
177
178
179/***********************************************************************/
180
181void hang (void)
182{
wdenk3be717f2004-01-03 19:43:48 +0000183#ifdef CONFIG_STATUS_LED
184 status_led_set(STATUS_LED_BOOT, STATUS_LED_OFF);
185 status_led_set(STATUS_LED_RED, STATUS_LED_BLINKING);
186#endif
wdenk60164a82003-10-08 23:26:14 +0000187 puts("### ERROR ### Please reset board ###\n");
188 for (;;);
189}
Mike Frysinger0870e472008-04-13 19:42:19 -0400190
191unsigned long do_go_exec (ulong (*entry)(int, char *[]), int argc, char *argv[])
192{
193 /*
194 * x86 does not use a dedicated register to pass the pointer
195 * to the global_data
196 */
197 argv[-1] = (char *)gd;
198 return entry (argc, argv);
199}